Lightweight ball seat

A ball-seat, light-weight technology, used in the production of fluids, wellbore/well components, earth-moving drilling, etc., can solve problems such as plugging wellbore, and achieve the effect of easy return, low density, light and small debris
CN109944571APending Publication Date: 2019-06-28VERTECHS OIL & GAS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
VERTECHS OIL & GAS TECH CO LTD
Publication Date
2019-06-28

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Abstract

The invention provides a lightweight ball seat. The seat comprises a lower joint, a slip, a sealing member and a central tube, the central tube is in a truncated cone shape, the sealing member and theslip sequentially sleeve the outer side of one end with a smaller outer diameter of the central tube in a direction in which the outer diameter of the central tube is reduced, one end of the sealingmember abuts the one end of the slip, and the end of the one end with a smaller outer diameter of the central tube is located in the slip; the end of the lower joint abuts the other end of the slip, and the lower joint is internally provided with a sealing tool connecting structure; the sealing member adopts a two-stage structure, and the hardness of the first-stage sealing member is smaller thanthe hardness of the second-stage sealing member. The ball seat is provided with the two-stage sealing member, and improves the reliability of the sealing during work, the design of the ball seat is compact and short, the material is a lightweight magnesium-lithium alloy material, the drilling efficiency is improved, after the work is finished, it is easy to return out, and the risk of clogging a wellbore is eliminated.
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Description

technical field

[0001] The invention relates to the technical field of downhole tools, in particular to a lightweight ball seat. Background technique

[0002] In the staged fracturing operation of oil and gas wells, composite bridge plugs or cast iron bridge plugs are usually used as staged tools, and these two types of bridge plugs have their own advantages. However, after the composite bridge plug fracturing operation is completed, these composite bridge plugs must be drilled and ground by coiled tubing to form a full-diameter wellbore. Due to structural and material limitations, drilling and grinding takes a long time and the drilling and grinding operation is difficult. , The length of the bridge plug is long, the density is high, the debris obtained by drilling and grinding is difficult to return, and there is a risk of blocking the wellbore.

[0003] The cast iron ball seat used in the staged fracturing operation is usually a large-diameter bridge plug, which is chara...

Claims

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